burn up vs firebomb

burn up

verb
  • To destroy by burning. 

  • To feel overly hot or inflamed. 

  • To anger; to annoy. 

  • To experience a high fever. 

  • To catch fire and burn until destroyed. 

firebomb

verb
  • To attack with a firebomb. 

noun
  • A weapon that causes fire; an incendiary weapon. 

How often have the words burn up and firebomb occurred in a corpus of books? (source: Google Ngram Viewer )